On Tue, May 12, 2015 at 05:37:41PM +0200, Maxime Ripard wrote:
> From: Lior Amsalem <[email protected]>
>
> Some engines (like Marvell mv_xor) do not support mult and sum_product
> operations as part of the pq support.
>
> This patch adds new flags: DMA_PREP_PQ_MULT & DMA_PREP_PQ_SUM_PRODUCT these
> flags helps the driver identify such operations.
>
> Signed-off-by: Lior Amsalem <[email protected]>
> Reviewed-by: Ofer Heifetz <[email protected]>
> Reviewed-by: Nadav Haklai <[email protected]>
> Signed-off-by: Maxime Ripard <[email protected]>
> ---
> crypto/async_tx/async_raid6_recov.c | 4 ++--
> include/linux/dmaengine.h | 4 ++++
> 2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/crypto/async_tx/async_raid6_recov.c
> b/crypto/async_tx/async_raid6_recov.c
> index 934a84981495..2db5486fd873 100644
> --- a/crypto/async_tx/async_raid6_recov.c
> +++ b/crypto/async_tx/async_raid6_recov.c
> @@ -47,7 +47,7 @@ async_sum_product(struct page *dest, struct page **srcs,
> unsigned char *coef,
> struct device *dev = dma->dev;
> dma_addr_t pq[2];
> struct dma_async_tx_descriptor *tx;
> - enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
> + enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P |
> DMA_PREP_PQ_SUM_PRODUCT;
>
> if (submit->flags & ASYNC_TX_FENCE)
> dma_flags |= DMA_PREP_FENCE;
> @@ -111,7 +111,7 @@ async_mult(struct page *dest, struct page *src, u8 coef,
> size_t len,
> dma_addr_t dma_dest[2];
> struct device *dev = dma->dev;
> struct dma_async_tx_descriptor *tx;
> - enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P;
> + enum dma_ctrl_flags dma_flags = DMA_PREP_PQ_DISABLE_P |
> DMA_PREP_PQ_MULT;
>
> if (submit->flags & ASYNC_TX_FENCE)
> dma_flags |= DMA_PREP_FENCE;
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index ad419757241f..f19ecebb4d3f 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -174,6 +174,8 @@ struct dma_interleaved_template {
> * operation it continues the calculation with new sources
> * @DMA_PREP_FENCE - tell the driver that subsequent operations depend
> * on the result of this operation
> + * @DMA_PREP_PQ_MULT - tell the driver that this is a mult request
> + * @DMA_PREP_PQ_SUM_PRODUCT - tell the driver that this is a sum product
> request
> */
> enum dma_ctrl_flags {
> DMA_PREP_INTERRUPT = (1 << 0),
> @@ -182,6 +184,8 @@ enum dma_ctrl_flags {
> DMA_PREP_PQ_DISABLE_Q = (1 << 3),
> DMA_PREP_CONTINUE = (1 << 4),
> DMA_PREP_FENCE = (1 << 5),
> + DMA_PREP_PQ_MULT = (1 << 10),
> + DMA_PREP_PQ_SUM_PRODUCT = (1 << 11),
Any reason for skipping 6 to 9?
Andrew
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